According to one hypothesis, the first eukaryotic cells originated by 

A. spontaneous generation.
B. biogenesis.
C. endosymbiosis.
D. mitosis.


C. endosymbiosis.

Biology & Microbiology

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Medicines containing hormones affect developing in the fetus

a) lungs b) brain structures c) limbs d) muscles

Biology & Microbiology

Conversion of excess amino acids into carbohydrate and fats during the absorptive state takes place in the

A. liver. B. brain. C. intestine. D. kidney. E. heart.

Biology & Microbiology

Suppose you cross a pea plant with yellow, smooth seeds with one that has green, wrinkled seeds

You examine the seeds of 967 offspring and find that some have yellow, smooth seeds and some have yellow, wrinkled seeds, but no green seeds of either type show up. What is the genotype of the yellow-seeded parent? (Y = yellow, y = green; S = smooth, s = wrinkled) A) YYSS B) YySS C) YySs D) YYSs E) YYss

Biology & Microbiology

Which of the following is an incorrect pairing?

A) magnification; refraction of radiation B) contrast; staining techniques C) numerical aperture; curved glass D) dark field: high contrast E) electron beams; shorter wavelength

Biology & Microbiology